gtkradiant/radiant/winding.h

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/*
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
//returns true if the planes are equal
int Plane_Equal(plane_t *a, plane_t *b, int flip);
//returns false if the points are colinear
int Plane_FromPoints(vec3_t p1, vec3_t p2, vec3_t p3, plane_t *plane);
//returns true if the points are equal
int Point_Equal(vec3_t p1, vec3_t p2, float epsilon);
//allocate a winding
winding_t* Winding_Alloc(int points);
//free the winding
void Winding_Free(winding_t *w);
//create a base winding for the plane
winding_t* Winding_BaseForPlane (plane_t *p);
//make a winding clone
winding_t* Winding_Clone(winding_t *w );
//creates the reversed winding
winding_t* Winding_Reverse(winding_t *w);
//remove a point from the winding
void Winding_RemovePoint(winding_t *w, int point);
//inserts a point to a winding, creating a new winding
winding_t* Winding_InsertPoint(winding_t *w, vec3_t point, int spot);
//returns true if the planes are concave
int Winding_PlanesConcave(winding_t *w1, winding_t *w2,
vec3_t normal1, vec3_t normal2,
float dist1, float dist2);
//returns true if the winding is tiny
int Winding_IsTiny(winding_t *w);
//returns true if the winding is huge
int Winding_IsHuge(winding_t *w);
//clip the winding with the plane
winding_t* Winding_Clip(winding_t *in, plane_t *split, qboolean keepon);
//split the winding with the plane
void Winding_SplitEpsilon(winding_t *in, vec3_t normal, double dist,
vec_t epsilon, winding_t **front, winding_t **back);
//try to merge the windings, returns the new merged winding or NULL
winding_t *Winding_TryMerge(winding_t *f1, winding_t *f2, vec3_t planenormal, int keep);
//create a plane for the winding
void Winding_Plane(winding_t *w, vec3_t normal, double *dist);
//returns the winding area
float Winding_Area(winding_t *w);
//returns the bounds of the winding
void Winding_Bounds(winding_t *w, vec3_t mins, vec3_t maxs);
//returns true if the point is inside the winding
int Winding_PointInside(winding_t *w, plane_t *plane, vec3_t point, float epsilon);
//returns true if the vector intersects with the winding
int Winding_VectorIntersect(winding_t *w, plane_t *plane, vec3_t p1, vec3_t p2, float epsilon);